How To Extend The Service Life Of Fluorine-lined Valves?

Among the corrosion-resistant materials, polytetrafluoroethylene has incomparable excellent properties. In addition to its excellent chemical stability, it has good anti-fouling and anti-sticking properties, extremely small dynamic and static friction coefficient values, and good anti-friction and lubrication properties. It is used as a sealing pair for opening and closing valves to reduce the friction between the sealing surfaces, reduce the valve operating torque, and increase the service life of the product. Its scope of use can also be extended to the food and pharmaceutical industries.

Lined Valve is also known as anti-corrosion valve. The working conditions it is in are often harsh. It is either toxic and harmful chemicals or highly corrosive acids, alkalis or organic solvents. Improper use will result in significant economic losses and serious consequences.

Applicable media: various concentrations of acids, alkalis, salts and certain organic solvents.

Features: It is the world's current anti-corrosion material, and has been widely used in large-scale equipment and pipeline linings for rotational molding.

Correct use and maintenance of valves can extend the service life of fluorine-lined valves. So how can we effectively protect it?

1. Before use, carefully read the instructions for use of fluorine-lined valves.

2. Use within the range of pressure, temperature and medium specified on the nameplate or in the manual.

3. When using, in order to prevent the fluorine-lined valve from generating excessive pipeline stress due to temperature changes, the temperature change should be minimized as much as possible, and U-shaped expansion joints should be added before and after the valve.

4. It is forbidden to use a lever to open and close the fluorine-lined valve. Pay attention to the opening and closing indication position and limit device of the fluorine-lined valve. After opening and closing, do not force it to close again to avoid premature damage to the fluorine plastic sealing surface.

5. For some unstable and easy-to-decompose media (such as the decomposition of some media will cause volume expansion, causing abnormal increase in working pressure), which may cause valve damage or leakage, measures should be taken to eliminate or limit the factors that cause the decomposition of unstable media. When selecting valves, the possible changes in working conditions caused by the unstable and easy-to-decompose media should be considered, and fluorine-lined valves with automatic pressure relief devices should be selected.

6. For fluorine-lined valves on pipelines with toxic, flammable, explosive, and highly corrosive media, it is strictly forbidden to replace the packing under pressure. Although fluorine-lined valves are designed to have a sealing function, it is not recommended to replace the packing under pressure.

7. For pipelines with self-ignitable media, measures should be taken to ensure that the ambient temperature and operating temperature do not exceed the self-ignition point of the medium to prevent dangers caused by sunlight or external fire.